Sharing Data Roles
About Shared Data Roles
If your graph object contains multiple graph elements, you can specify that some data roles be shared across two or more graph elements.
You share data roles when you want the graph elements to use the same data role for
either of their axes. When report designers who use the graph object in their reports
assign roles, a single data column is assigned to all roles that use the shared role.
Note: If the graph element types
are compatible, overlaid graph elements are automatically assigned
a shared role. (See Incompatible Graph Elements.) You can unshare a role if needed.
Shared roles are very useful in user-defined lattices. They enable you to manage data roles across columns and rows. For example, you might
share data roles if you want to analyze relationships in your data.
In this example, the
X axis of the scatter plot shares a role with the Measure axis of
the bar chart.
When the graph object
is used in the designer, the data might be applied as shown in the
following example.
The bar chart shows
engine sizes for different regions of the world. (The engine size
has been changed from a Sum to an Average measure.) The scatter plot
shows the miles-per-gallon trend for the different engine sizes.
Share or Unshare a Data Role
To share a data role,
on the Role Definitions tab, click 
next to the role that you want to share. Select Create
Shared Role With Another Role and then select the name
of a role.
next to the role that you want to share. Select Create
Shared Role With Another Role and then select the name
of a role.
You can also click Add
Shared Role, and then create and share the data role.
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